Taiwan Number Format
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Format Rules
Taiwan formatting implementation notes
For Taiwan, format numbers with the explicit locale zh-TW; the reference value 1234567.89 renders as 1,234,567.89.
Taiwan's reference format uses "." as the decimal mark and comma (",") for grouping. The integer uses repeating groups of three digits. Pass "zh-TW" directly to Intl.NumberFormat instead of replacing punctuation in a preformatted string.
TWD is shown with NT$ immediately before the amount; the same reference value renders as NT$1,234,567.89. The percent sign appears immediately after the amount. Use the ISO currency code for storage and interchange because a visible symbol can be shared by unrelated currencies.
Western 0β9 digits are the page's reference digit system, and the negative pattern is -n. Treat zh-TW as the reference locale for this page, but still respect the user's explicitly selected language and numbering-system preferences. Validate output with formatToParts() when spacing, signs, or bidirectional literals affect the interface.
- Locale: zh-TW
- Decimal and grouping: 1,234,567.89
- Currency: TWD β NT$1,234,567.89
- Digits: Western 0β9 digits
Reviewed 19 July 2026. Sources: Unicode locale number formats Β· Intl.NumberFormat reference
What's different here
- Number punctuation matches en-US. Only the currency (NT$, TWD) differs.
- Uses the same number pattern (decimal mark, grouping, symbol and percent placement) as Japan, China, Hong Kong, Singapore, South Korea and Malaysia in Asia, plus 24 pages in other regions.
- Nearby differences: India (en-IN) uses Indian 3-then-2 grouping instead of repeating groups of three; Pakistan (ur-PK) uses Indian 3-then-2 grouping instead of repeating groups of three; Bangladesh (bn-BD) uses Indian 3-then-2 grouping instead of repeating groups of three.
- Currency: TWD has ISO minor unit 2. This directory shows the disambiguated symbol NT$; the native symbol is $.
Code Examples
// Basic number
new Intl.NumberFormat('zh-TW').format(1234567.89)
// β "1,234,567.89"
// Currency
new Intl.NumberFormat('zh-TW', {
style: 'currency',
currency: 'TWD'
}).format(1234567.89)
// β "NT$1,234,567.89"
// Percentage
new Intl.NumberFormat('zh-TW', {
style: 'percent',
minimumFractionDigits: 1
}).format(0.125)
// Compact notation
new Intl.NumberFormat('zh-TW', {
notation: 'compact'
}).format(1234567)Negative Number Formats
new Intl.NumberFormat('zh-TW').format(-1234567.89)new Intl.NumberFormat('zh-TW', { style: 'currency', currency: 'TWD', currencySign: 'accounting' }).format(-1234567.89)
Continue your localization implementation
Connect this reference to the format, validation, and testing guidance used elsewhere on the site.
Formatting implementation
Numbers, currencies, dates, time zones, numbering systems, and production tests.
Failure patterns
Hardcoded copy, broken layouts, missing context, bidi, and cultural adaptation.
Standards reference
ISO country, currency, and language codes; BCP 47; E.164; and UPU S42.
Validation coverage
Provider evidence, country test cases, geocoding, deliverability, and phone checks.
Locale-aware numbers
Separators, grouping, currency precision, and Intl.NumberFormat patterns.
Localization testing
Pseudolocalization, test matrices, native review, and regional release gates.
Address and phone standards
UPU S42, E.164, adaptive forms, storage, parsing, and validation.
I18n architecture
Messages, Unicode, RTL, locale services, fallbacks, and delivery workflow.
Currency reference
ISO 4217 codes, symbols, minor units, and implementation examples.
Address formats
Country templates, field order, and accessible international forms.
Phone formats
E.164 storage, regional display, parsing, and validation.
Compare locales
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